Concentric stir-bar with beaker cover "CENTRIMAN". Encased in P.T.F.E. with an adjustable axis bar made of AISI 304 stainless steel. Suitable for applications with volumes of 100 to 2000 ml. Soft start stirring and adjustable height prevents the stir-bar jumping inside the vessel. Conical fitting lid of polypropylene with excellent chemical and thermal properties that resists temperatures up to 160 °C. The lid has an auto-lubricating central axis hole with two lateral air displacement holes.